Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a15a1d35c25e01…

MALICIOUS

PDF

67.7 KB Created: 2021-03-06 14:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c35dbbffd45f155f9629c3f066e0702f SHA-1: 65a4f70b1fc6f3f9e5fa72f39317e7ca98b09ab8 SHA-256: 42a15a1d35c25e0117c486aea10b0467205030463011ab6d4ef668ce2bb14059
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('golowaki.ru') and another to a link farm ('scienceontheweb.net'), suggesting it's designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains metadata related to product searches, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://golowaki.ru/strik?utm_term=canon+p23-dh+v+ink+roller PDF link annotation
    • http://tupaxeguna.scienceontheweb.net/kung_fu_panda_legends_of_awesomeness_enter_the_dragon_game.pdfIn PDF document text
    • http://xapozibun.22web.org/can_i_watch_la_la_land_on_netflix.pdfIn PDF document text
    • http://bomisedoxu.mywebcommunity.org/napojejaxi.pdfIn PDF document text
    • http://raxewapikeb.mygamesonline.org/safety_disney_movie_budget.pdfIn PDF document text
    • http://tomerezadix.iblogger.org/best_graphic_design_app_for_android.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/841254268.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lofese/6897782713.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/facebook_lite_app_mobile.pdfIn PDF document text
    • http://dexedigobejo.rf.gd/95458477999.pdfIn PDF document text
    • http://witosef.rf.gd/sale_of_business_property_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5aa23a-2f19-4f81-8971-7b19c4d12a1e/vudimuzozaxejagok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8df140cd-838b-4aef-85a1-823dce5de431/41692140622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2e4b00-27ab-4779-95ce-b3ad5c15ec91/36188786508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e4a18f-727a-42c1-a91f-d0c1b2045776/21769112212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e970afb-dfc1-4550-b91c-3f41a4ca83ac/canon_pixma_ip90_driver_windows_7_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c0bed8-cfb7-4b2b-9c59-ac61eccf6b9f/mini_dv_tape_transfer_to_computer_without_camcorder.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/mepozunagepipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d69c61e-1600-44c6-9aec-2811be9eba9e/lorozasiniravowafixu.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/nikezibevivodadasudovotif.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/subway_flatbread_sandwich_nutrition_facts.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/vemekijuzitinivewivalu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC71 5228 bytes
SHA-256: 4db21403b1d6b5faafca696e217b38ffee04044b55b474a39596fe72f001daf9
font_01_sfnt_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 10308 bytes
SHA-256: 0ab0b9adb80ff37e3eac61ddfe247a83695c58bea37e37e5fde0d3dbb2740fb7

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